XJ XJ8 / XJR ( X308 ) 1997 - 2003

Sticky RPM's After Rebuilt Throttle Body

Thread Tools
 
Search this Thread
 
  #21  
Old 07-23-2015, 09:33 AM
ajayaluru's Avatar
Junior Member
Join Date: May 2015
Location: jersey city
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

Yes but there is no effect at all even after doing it for 10 mins the check engine light is still on
 
  #22  
Old 07-24-2015, 08:49 AM
smtguy's Avatar
Senior Member
Join Date: Mar 2012
Location: SOUTHERN CALIFORNIA
Posts: 536
Received 58 Likes on 51 Posts
Default

If it was my car, I would check for vacuum leaks, try adjusting the TPS again, then call ASI if I was still stuck.

When I got my TB from ASI I had the high idle condition which tells me that they don't really adjust the TPS before they send the units out, but I could be wrong. I spent some time with the adjustment because I did it on the car, did a hard reset, then ran the engine and let the computer "re-learn" everything. No problems after that.

Good luck!
 
  #23  
Old 07-25-2015, 05:32 PM
ajayaluru's Avatar
Junior Member
Join Date: May 2015
Location: jersey city
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default Various problems with my car

Hi sorry for being a bother but after I tried adjusting the tps I realised I came out too high on the adjustment and the rpm just went into overdrive after I erased the codes and did a hard reset. Then I noticed that the coolant was leaking under the hood not sure where its leaking from but I see it is flowing down like water from a tap after I switched off the ignition at the front bumper near the passenger side of the car any help would be appreciated Thank you for helping me out
 
  #24  
Old 07-25-2015, 06:23 PM
Sean B's Avatar
Veteran Member
Join Date: Oct 2008
Location: Sunny Southport UK
Posts: 4,755
Received 1,337 Likes on 1,056 Posts
Default

that sounds like the engine coolant overfill, let the car cool down to ambient and check your coolant level. When the coolant cools it gets sucked back into the system it's called the expansion tank.
RPM 'overdrive' what exactly does that mean, how long did the engine run in this state?

Be very careful about what you do with the throttle, did you have a multimeter to test the outputs and get it in that area before fitting? If so, send it back.
 
  #25  
Old 10-24-2017, 02:06 PM
maxipes's Avatar
Junior Member
Join Date: Mar 2017
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default

Hi all, sorry for my bad english.

I have same problem, xx months trying to solve the P0121 problem. Finaly today i change the throttle body. Connected battery back, started the car, idles goes up to 3000rpm, then slowly goes down, but stopped at 1100rpm. before the temperature reach normal, system fault and there is code P0507 - idle control sytem higher than expected ;/

May be position of screws on TPS cause of high idle?

thanx for any help


 
  #26  
Old 10-24-2017, 03:44 PM
JagV8's Avatar
Veteran Member
Join Date: May 2009
Location: Yorkshire, England
Posts: 26,643
Received 4,483 Likes on 3,901 Posts
Default

Or you have an air (vacuum) leak. (Search will explain.)
 
  #27  
Old 10-24-2017, 04:38 PM
maxipes's Avatar
Junior Member
Join Date: Mar 2017
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default

There wasnt a vacuum leaks before exchange, only that I would tighten up these 2 hoses on TB badly, but i dont think so ;/

I continue searching, thanx
 
  #28  
Old 10-24-2017, 05:26 PM
Sean B's Avatar
Veteran Member
Join Date: Oct 2008
Location: Sunny Southport UK
Posts: 4,755
Received 1,337 Likes on 1,056 Posts
Default

Originally Posted by maxipes
Hi all, sorry for my bad english.

I have same problem, xx months trying to solve the P0121 problem. Finaly today i change the throttle body. Connected battery back, started the car, idles goes up to 3000rpm, then slowly goes down, but stopped at 1100rpm. before the temperature reach normal, system fault and there is code P0507 - idle control sytem higher than expected ;/

May be position of screws on TPS cause of high idle?

thanx for any help



That is most likely the problem, the normal throttle startup is 1500rpm, then back down to almost stall, then settles at 550-600.
If you adjust the position, try and set it as close to the 'old TB'. If it's still running higher than normal, a very, very small adjustment in the same direction to bring the rpm down.
 
  #29  
Old 10-24-2017, 05:42 PM
maxipes's Avatar
Junior Member
Join Date: Mar 2017
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default

So unfortunately it's even worse, there is P1229 - Throttle motor control circuit malfunction

What I did today, better in present time:

- remove positive cable from batery
- disconnect all available connectors and clean it once again, finaly use nano electric isolator
- move TPS close to original (on old TB) position
- connect everything back
- for a few hours I let it go
- connect the battery
- insert key to ignition
- Failsafe mode comes immediately after turning the key to the second position and can not be deleted any way.

maybe tomorrow I will put old TB back and I will live with occasional P0121
 

Last edited by maxipes; 10-25-2017 at 02:42 PM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Gus
XK8 / XKR ( X100 )
16
10-15-2019 12:29 PM
ajacks86
XK / XKR ( X150 )
8
10-12-2017 08:51 PM
xjrjag
XJ XJ8 / XJR ( X308 )
18
09-27-2015 01:53 AM
mrplow58
XK8 / XKR ( X100 )
15
09-09-2015 11:27 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: Sticky RPM's After Rebuilt Throttle Body



All times are GMT -5. The time now is 12:23 AM.